Battery for a backpack vacuum appliance



FIG. 1 is an isometric front perspective view of the front and upper surface of the battery for a backpack vacuum appliance;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a side view, showing the side opposite that shown in FIG. 4;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines in the Figures are for the purpose of illustrating exemplary environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a battery for a backpack vacuum appliance, as shown and described. 